Knob-fastening.



No. 818,565. PATENTBD APR. 24, 1906. F. J. SGHWARZ.

KNOB FASTENING.

APPLICATION FILED AUG.14,1905.

, INVENTOR E edeflb/zJJcka/a/g UNTTED STATES V PATENT OFFICE.

FREDERICK J. SCHWARZ, OF NETV YORK. N. Y., ASSlU-NOR TO 1. E. UUERIN. OF NEW YORK, N. Y., A CORPORATION OF NE\\" YORK.

KNOBFASTENING.

Specification of Letters Patent.

Patented April 24, 1906.

Application filed August 14,1905. Serial No. 274,049.

To all whom it nut/y concern:

Be it known that l, FREDERICK J. Scnwanz, a citizen of the United States, and a resident of New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Knob-Fastenings, of which the following is a specification.

The invention relates to improvements in knob-fastenings; and it consists in the novel features and combinations of parts herein after described, and particularly pointed out in the claims.

The object of my invention is more espe cially to provide suitable means for securing glass knobs or knobs of frangible material to spindles in such manner that the knobs will be unable to turn thereon, but may be utilized to turn such spindles.

I present my invention herein as embodied in a door-knob, the knob proper being of one integral piece of glass having secured on the end of its shank a metal cap which contains a socket to receive the usual spindle and two stops which enter recesses in said shank and prevent the turning of the latter in said cap, the latter being secured upon the shank by having its outer edges closely pressed over an annular shoulder formed thereon. ()ne of said stops is simply a pin or stud connected with the cap and projecting into a recess formed in the end of the shank, and the other of said stops will preferabl y be formed by a screw extending transversely into the cap and the hub therein and engaging the spindle, said screw then serving not only as a stop, but also as the means for securing the knob to its spindle. The knob-securing means presented enable the convenient attachment of the glass knob to all usual door-knob spindles, rendering it convenient to simply detach the prior knobs therefrom and substitute the glass knobs of my invention.

I do not limit the invention to its employment exclusively for door-knobs, since it is my purpose to utilize the new knobs in other ctmnections also.

The invention will be fully understood from the detailed description hereinafter prcsented, reference being had to the accompanying drawings, in which- Figure 1 is a detached end view of the glass knob looking directly at the end of the shank. Fig. 2 is a detached end view of the cap to be applied on the shank of the knob, the screw and spindle being shown in position in said cap. Fig. .3 is a longitudinal section of the knob, cap, and spindle; and Fig. 1 is a detached side elevation, partly broken away and partly in section, of the knob.

ln the drawings. denotes a glass doorknob, 11 a usual door-knob spindle, and 1'. a metal cap secured on the end of the shank 11 of said knob. The knob 10 is formed on the exterior of its shank with an annu lar shoulder 15, and within said shank is formed a central socket 16. The end of the shank 1-11 contains recesses 17, which are preferably in the form of transverse grooves in line with each other and extending from the outer edges of the shank inwardly into said socket 1(5. The metal cap 12 lits upon the end of the shank l1 and is secured thereto by having its outer edges 15 pressed inwardly upon the annular shoulder 15 there of, said cap being thus attached without danger of fracturing the knob. The cap 12 contains the central hub 11), which receives the end of the spindle 11, and extends into the socket 16 of the knob-shank. W'ithin the cap 12 I provide two stops 20 21, respec tively, which enter the recesses 17 of the knob-shank and prevent the turning of the knob within the cap 12 or independently of the spindle 11. The stop '20 is in the form of a pin or stud, and the stop 21, is created by a transverse screw which not only serves as a stop, but also as the means for fastening the knob upon the end of the spindle 1.1. The screw 21 passes through the side of the cap 12 and the side of the hub 19 and enters a transverse hole in the spindle 11, whereby said cap becomes fastened to the spindle, and the entire structure considered the knob, cap, and spindle may be turned axially together. The knob of my invention, therefore, comprises the knob proper and a metal cap applied on the end of the shank thereof and secured thereto by having its outer edges pressed inwardly upon an annular shoulder 15, formed on said shank, said cap also having a hub to receive the end of the spindle, and the whole being fastened to turn together. The shoulder 15 is formed by grooving the shank 14, and this groove not only affords the shoulder 15, but receives the .in

turned edges of the cap, protecting said edges and imparting a desirable finish to the article as a whole.

A desirable feature of the special construction shown is that with the screw 21 absent the stop 20 will so hold the knob that the groove-recess 17 for the screw will be kept in line with the holes for the screw in the side and hub of the cap, whereby the knob, with the cap 12 rigidly secured thereon, may be cpnveniently applied to existing knob-spind es.

WVhat I claim as my invention, and desire to secure by Letters Patent, is-

1. The knob having in the end of its shank oppositely-disposedrecesses, combined with the metal cap secured on said shank and having a hub to receive the spindle and stops to enter said recesses substantially as set forth.

2. The knob having in the end of its shank oppositely-disposed recesses, combined with the metal cap applied on said shank and having a hub to receive a spindle and stops to enter said recesses, said cap having its outer edges pressed into an annular groove formed in said shank and affording a shoulder to receive said edges; substantially as set forth.

3. The knob and the shank therefor having in its end the socket and oppositely-disposed recesses, combined with the spindle, the metal cap secured on said shank and having a hub to enter said socket and receive the spindle, a stop to enter one of said recesses and a screw to enter the other recess and secure the spindle to said cap, said screw eX- tending transversely through the side of said cap and along its said recess and through the side of said hub; substantially as set forth.

Signed at New York city, in the county of New York and State of New York, this 12th day of August, A. D. 1905. I

FREDERICK J. SCHWARZ.

\Vitnesses CHAS. C. GILL, ARTHUR MARION. 

